Subject: Re: [harryproa] rudder depth
From: "Mark Stephens" <stephens@ozconnect.net>
Date: 3/2/2006, 6:48 AM
To:
Reply-to:
harryproa@yahoogroups.com.au

I'm intending to cut 500mm from the bottom of the Visionarry rudders. I'm redesigning and rebuilding the boxes so I will angle the blade more forward to retain the balance. They will basically work the same as before except the whole rudder box will break away when the shear pins break, leaving behind the pivot shaft and quadrant. This way I can use most of the same components as before avoiding a total rebuild. This is still the best option until the drum rudders prove themselves.
 
Mark
 
 
Mark Stephens
www.harryproa.com
0431 486814
----- Original Message -----
From: Robert
To: harryproa@yahoogroups.com.au
Sent: Wednesday, March 01, 2006 8:33 PM
Subject: [harryproa] rudder depth

with the tracking ability shown by success of the single rudder
elementarry, is it possible that the rudders on the Visionarry don't
need to be as deep. A 10% decrease in depth would be  a 10% decrease in
wetted area and about an 18% decrease in the load on the rudder
supports.
regards,
Robert





 
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